The Cloud Summit, led by Simon Wardley, brings together the leading lights of cloud and open source. With the recent announcement by Rackspace of OpenStack, the topic has never been more timely. Expect energetic debate and exciting conclusions, with plenty of opportunity for participation.

Scala is a JVM-based language with a large and growing following. Credible with startups and enterprises alike, it's a modern way to use Java. Together with the authors of O'Reilly's Programming Scala, Alex Payne and Dean Wampler, we've assembled a full day exploring this new language and its ecosystem.

At 7pm tonight, we kick off with Ignite OSCON. Ignite is a fast-paced evening, packed with entertaining and inspirational presentations. Sandwiched in between the two halves of Ignite, we'll be handing out the Open Source Awards to people who have made exceptional contributions to open source.

We're posting speaker slides as soon as we get them from the speakers. Find them here. (Not all speakers choose to share their slides.)

Don't forget to rate the talks you attend: look for the rating link at the top-right of the session description page.

You can get the latest news from around the show by following @oscon on Twitter or Identi.ca.

Be sure to check the "After Hours" board near Registration for details of other parties and gatherings tonight.